My previous ideas were a dead end because it seemed to me that I was trying way to hard to make them interesting (plus college got in my way).

My first idea revolves around this abandoned farmhouse (https://www.theexplorographer.com/2013/12/paradise-lost/) in Seneca lake, New York where the last of a race of sentient vintage cars die/go to die. The SCP foundation came to the interest of this place when reports of seemingly broken down vintage cars working without anyone driving themselves in nights across the U.S. seemingly all driving towards the area around the farmhouse. I'm still tying to figure out what pictures and if i have the permission to use them.

Second idea is how certain household pets were devolved into their current state through millions (a long time, still trying to narrow down the timeframe) of years through secret genetic manipulation (via a outside force/a group of interest) for protection and now these pets are now going back to their original state (dogs to various forms of werewolves, goldfish to giant werefish types, parrots to thunderbird esque birds). I know this idea is a tad bit broad which is why I'm considering narrowing down this entire idea.

This brings up all sorts of questions. If these are the "last of a race", does this mean they reproduce somehow? How do these anomalous cars function without drivers? What designates "car death" here? How do they move without drivers or (presumably) fuel to keep them going? Also, why a farmhouse, as opposed to a wide stretch of road or a garage or something more car-related?

Second idea is how certain household pets were devolved into their current state through millions (a long time, still trying to narrow down the timeframe) of years through secret genetic manipulation

I mean, technically that's what already happened in real life, especially with "purebred" dogs. Same goes for some species of cats, which is why domestic shorthairs don't do their business in sinks the way their more feral relatives do.

for protection and now these pets are now going back to their original state (dogs to various forms of werewolves, goldfish to giant werefish types, parrots to thunderbird esque birds)

I don't quite follow this logic, especially since if someone wanted to protect a dangerous animal, it might make more sense to just try and drive it somewhere away from humans, as opposed to making them into smaller, easier to kill, shorter lifespan things that humans will poach, inbreed, and otherwise exploit (just look at most bettas sold in chain pet stores).

Overall, I'm not really sure about these ideas because they seem kind of… half-thought-out? The first one I think is more workable, but there's a lot more background that I think should be considered for it to stand a chance on the mainsite.